Rotary steam engine



A118- 8, 1933- M. L. DARR ROTARY STEAM ENGINE 2 Sheets-Sheet l FiledSept. 10, 1930 INVEN TOR. v WmdHa/W WMM A TTORNEYS.

Allg, 8, 1933. M DARR 1,921,662

ROTARY STEAM ENGINE Filed sept. 10`, 195o 2 sheets-sheet 2 A TTORNE YS.

Patched 'iiiaaiesa .l p'

UNITED-STATES;PATENT:

g j1,9z`1,6s2 Y Romiti? STEAM ENGnvEy Y ,Milford 'Ll'Ilarri Oakland,Calif. 'o Applicun september 10,Y 19.30 i serialNo. ,480,877`

zclaiins. (el. m1- 56) "This invention relates to rotary steam enginessurfaces flush with the surfacesv lof thef wail and lhas for itsprincipal object :the 4prcvisionlof 15 or at right ,anglestheretp aswill be described. a simple but Jeiiicient rotary motor'fof the typeArranged cencentrically of the stator `1 0-isisJ employing an expanding4iiu'id as an 'operating rotor 19 having,afcircularV cylinder 20enclosing 5 medium, i 1 y. the packing section and .division wall `of.the 60 In'carrying `theinventionfinto practice I prostator.. This.cylinder is cylindrical `incross sccvide a rotor whichincludes'acircularcylinder tion and'has a here of a diameter Vagreeingwith divided into compartments by means of vanes. Vthe width ofthe wallwhichis .disposcdvcen-i Y The rotor revolves abouta stator `carrying apair traily thereof'and also agreeing 'with the diame:

10 of abutmentswhich-cooperate with thevanes on terand conteur ci"thefstator'abutnients 17...; At 55 v the'rotor 'so that the action ofthe expansive its inner peripherythe,cylinder 20 hasavrim porvapor`injected between the stator abutments and tion 21'eznbraeing. thepacking section 1419i :the l' rotor vanes' at correctly timed inter-valswill stator., Between adjacentfsuraces of the :rim

. cause revolution of the rotor. The constructionl sect-.on 21 andpacking section 14 packing rings 0f 'the cylinder and varies issuchfthat the vanes A23 re provided which are `circular and which-.are70 is exemplied in theollowing description and 'The rirn'sectio'n 21erinthe rotor may pass the abutments `carriedby spring-pressed intoengagement with grooves in the stator so fthat'the motor may operate inconthe rim section of the cylinder `so as to prevent tinuousV cycles. ui i i the `escape or leakage of Huid rom `the interior One form `which`the invention may assume ci `'the cylinder tothe atmosphere. Y jthe`-cylinder i2() is acon- 75 illustrated by way off Iexample in theaccomnected by 'spokescr ether suitable means fto hubs i g panyingdrawings, `inrwhich: A 24,-oneof which'is revolublymounted on'a sta-Fig. 1 is a central section taken coaxially` tionary'intake tube 25V andthe other .of which is through lthe motor..v 'revclublymounted. on .thestationary hub 11 ci `.25 Fig. 2 isv a plan section Staken transverselythe stator. Projecting withinzthe hub ,1,1 of the 480 through the rotorand-stator. i y stator isan exhaust' tube 26 through which the vFig. 3is `a side elevation of the 'motor with intake' tube telescopes. Bethof' the'seytulzies parts broken away to more clearly disclose cerare,of" course, stationary and as the connection tain features ofconstruction. Y Y between: the tube 25,1 the source of expanding '30Fig. 4 is a fragmentary view showingithe coniiuid supply; and theconnection between the ex- S5 struction :of the -cam ring which`operates the haust tube 26 and auxiliary mechanism forms ,no statorabutments. y i part of the present'invention it 'hasnotibeen .il-

' Fig. 5 is la fragmentary view in plan section `lustrated.

- throughthe Vvrotorand stator showing the Irnan- It will be noticedfrom Figs. 1 and .4 @that'fthe M ing-drawings, 10 4iridimrtesastatorhaving a hub stator abg-bments 17 ism@ nerin which the operationof the stator abut@ inner periphery ofthe rim section 21 of` the -cyl-90 ments controls Ythe injection of theexpansible `inder 20 isfcrmedwithra pairfof annular:flanges fluid. v 1` cooperating to form yacircularcarn groove `2'1' Referring `more particularly totheaccompanyhaving three oisets 2,8 therein. Each of @the unted on arotatable "40 section 11 rfromgwhich radiate `tubular arms 12 Spk@igah'avng a @am `'Shoe 29 xed .mel-ecm.4 95v "45 which extends about`the entire outer periphery v wan 15 tightly etang the opening 16 withtheir 33 into engagement with theradjacent surface ofgfiio' ing sectlon,14' Formed 'mtegrauy Wlth mls* C11?" .the cylinder revolves, the statorl'abutments will cular packing section 14 `is an annular cylinder bepemtedat propeinterva'ls; l Y division-wall 4l5-wh1clr1- 1s circular,l1n form and Arranged Wtin tha Cylinder Zoaretheebyl; 160

inder varies 30, 30a,and 30h, disposedat right angles to the cylinderaxis and spaced at'equal distances apart about the interior of thecylinder.` Reference being had to Fig. 3.it will be seen that lof thepacking section 14 centrally thereof as illustrated in Fig. 1.

At diametrically opposed points on the cylinder division wall 15 it isformed with circular 4 16 Within which are mounted circular the vanasare formed in WOthiIVeS in 01@61 t0 aC- o emn s gator butments 17, theouter periphery of ech commodate the Wall 15 onthe stator. Each halfbeing fitted with a packing ring 18. These stator comprises a recessedWall 31 fOImed aS a .DSJIUO abutments 17 are rotatablein the openingsY16 sothe cylinder and between which is a packing' that they may bedisposed in the plane ofy the member 32 springpressed by means of aspring the wall to form a fluid tight joint therebetween.

In order to direct the expanding Iiuid into the ed to be out of registerwith intake ports 35 in the packing section 14 when the stator abutmentsr17 are disposed in the same plane as the wall 15. When the statorabutments 17 are disposed at right angles tothe plane of the wall 15,the ports 34. will be in register with the ports 35 so that theoperating fluid will be admitted to Y the cylinder.

In order to exhaust the cylinder at the proper intervals, at the side ofthe abutments 17 oppo site the intake ports 35, the packing section ofthe stator isr formed with exhaustrports 36 which communicate withhollow of the exhaust tube 26. Y In operation of the device, it isconstructed as shown in the drawings and the outer periphery of thecylinder 20 is tted with a pulley or other driving element so that theenergy developed may be transmitted as desired.

Assuming that the rotor vanes are in the position illustrated in Fig. 2,it will be seen that the cylinder 20 will be divided into compartmentsA, B, C andD. In the compartment A the intake ports 34 and 35 will be inregister so that expanding fluid will be admitted and will act betweenthe stationary. stator abutment 17 and the rotor vane 30, causing thelatter toV move in the direction ofthe Varrow and impart rotation to therotor. It will be seen that fluid will pass through the openings 16 sothat fluid will be admitted to both chambers of the cylinder equally.

However, as the vane 30a'moves toward the statorY abutment 17, the oiset28 in the vcam will move the stator abutment 17 to a positionl in theplane ofthe wall 15. When in this position, the ports 34 and 35 are outof register which occurs while the rotor vanes pass over the statorabutments as illustrated at the right-hand side of Fig. 2 where it isshown that the vane 30h is passing overthe stator abutment 17.

' Just after the vanes 30 pass'over the stator abutment 17 the camactuates the stator abutments to again place the intake ports 34 and 35in register to admit theexpanding fluid to the compartments and impartrotation thereby to the rotor. However, as soon as the intake por-k tion.of the cycle is completed, the compartments will be exhausted throughthe exhaust ports 36 as the vanes move toward the succeeding statorabutment 17. d

It is obviousv that by my novel construction I am able to maintainleakage between the moving parts at a minimum so that my motor will beefficient in operation.

v spokes 12b, theseV Yspokes in turn communicating with the interiorlthe cylinder into a plurality of While I have shown the preferred formof my invention, it is to be understood that various changes may be madein its construction by those skilled inthe art Without departing fromthe spirit of the invention as deiined in the appended claims. l

Having thusl described my invention, what I claimand desire to secure byLetters Patent is:

. 1. A rotary motor comprising a stator having a packing section, a flatannular wall about the perimeter of said packing section, a rotormounted concentric with relation tothe stator and having Va circularcylinder enclosing said wall whereby the latter will divide the cylinderalong its axis, a rim section on the cylinder embracing the packingsection, packing means between the rim section -of the cylinder and thepacking section of the stator, said wall having a plurality of openingsformed therein, a rotatable abutment in each opening conforming to thecontour thereof vand to the contour of the bore of the-cylinder, saidrotatable abutments d being of a 'thickness agreeing with the thicknessof the wall and so mounted that they may lie' in the samefplane as thewall with the surfaces Ythereof flush with the surfacesof the Wall, aplurality ofvvanes` xed in the cylinder and arranged atright angles tothe axis thereof and spaced equal distances apart about thecircumference of the cylinder to divide the space between the Wall andtheinterior surface of the cylinder, a pair of annular flanges on therotor cooperating to forma cam track, a cam shoe fixed with relation tothe axis of each rotatable abutment and adapted to cooperate with saidtrack whereby the rotatableV abutments will be inthe plane ,of the wallwhen they register with the'cylindrical vanes and at right angles to theplane of the wall rWhile-out of register with the cylinderrvanes.

2. A rotary mctorcomprising a rotor including a circular cylinder, astator dividing the cylinder' along the axis thereof, said stator'havinga pair of diametrically opposed openings formed therein within thecylinder, a rotatable abutment ineach opening conforming thecontour'thereof and to the contour of the bore in the cylinder, apluralityof vanes xed inthe cylinder and arranged at right angles to theaxis thereof and dividing compartments, cam meansV automaticallyoperating the rotatable abutments to place them in the same plane withrthe stator when the cylinder vanes register therewith and position themat 'right angles to the intervals by rotation of said shafts to controlthe flow of fluid to the cylinder. v

MILFORD nfDARR. y

which are placed in register at properly timed i

